MinecraftUtil.java

package amidst.minecraft;

import java.awt.Point;
import java.util.List;
import java.util.Random;

import amidst.logging.Log;
import amidst.version.VersionInfo;

public class MinecraftUtil {
	private static IMinecraftInterface minecraftInterface;
	
	/** Returns a copy of the biome data (threadsafe). */
	public static int[] getBiomeData(int x, int y, int width, int height, boolean useQuarterResolutionMap) {
		return minecraftInterface.getBiomeData(x, y, width, height, useQuarterResolutionMap);
	}
	
	public static Point findValidLocation(int searchX, int searchY, int size, List<Biome> paramList, Random random) {
		// TODO: Find out if we should useQuarterResolutionMap or not
		// TODO: Clean up this code
		int x1 = searchX - size >> 2;
		int y1 = searchY - size >> 2;
		int x2 = searchX + size >> 2;
		int y2 = searchY + size >> 2;
		
		int width = x2 - x1 + 1;
		int height = y2 - y1 + 1;
		int[] arrayOfInt = getBiomeData(x1, y1, width, height, true);
		Point location = null;
		int numberOfValidFound = 0;
		for (int i = 0; i < width*height; i++) {
			int x = x1 + i % width << 2;
			int y = y1 + i / width << 2;
			if (arrayOfInt[i] > Biome.biomes.length)
				Log.crash("Unsupported biome type detected");
			Biome localBiome = Biome.biomes[arrayOfInt[i]];
			if ((!paramList.contains(localBiome)) || ((location != null) && (random.nextInt(numberOfValidFound + 1) != 0)))
				continue;
			location = new Point(x, y);
			numberOfValidFound++;
		}
		
		return location;
	}
	
	/**
	 * Gets the biome located at the block-coordinates.
	 * This is not a fast routine, it was added for rare things like
	 * accurately testing structures.
	 * (uses the 1:1 scale biome-map)
	 * @return Assume this may return null.
	 */
	public static Biome getBiomeAt(int x, int y) {
		
		int[] arrayOfInt = getBiomeData(x, y, 1, 1, false);
		return Biome.biomes[arrayOfInt[0] & 0xFF];
	}
	
	public static boolean isValidBiome(int x, int y, int size, List<Biome> validBiomes) {
		int x1 = x - size >> 2;
		int y1 = y - size >> 2;
		int x2 = x + size >> 2;
		int y2 = y + size >> 2;
		
		int width = x2 - x1 + 1;
		int height = y2 - y1 + 1;
		
		int[] arrayOfInt = getBiomeData(x1, y1, width, height, true);
		for (int i = 0; i < width * height; i++) {
			Biome localBiome = Biome.biomes[arrayOfInt[i]];
			if (!validBiomes.contains(localBiome)) return false;
		}
		return true;
	}
	
	public static void createWorld(long seed, String type) {
		minecraftInterface.createWorld(seed, type, "");
	}
	
	public static void createWorld(long seed, String type, String generatorOptions) {
		minecraftInterface.createWorld(seed, type, generatorOptions);
	}
	
	public static void setBiomeInterface(IMinecraftInterface biomeInterface) {
		MinecraftUtil.minecraftInterface = biomeInterface;
	}
	public static VersionInfo getVersion() {
		return minecraftInterface.getVersion();
	}

	public static boolean hasInterface() {
		return minecraftInterface != null;
	}
}